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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






2. Why does estrus happen before ovulation?






3. ~305 days (altough often longer due to breeding difficulties)






4. Contains and regulates the temp of the testes for sperm production






5. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






6. Larger the cow - more milk is produced; smaller the cow - less milk is produced






7. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






8. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






9. 19-23 (21) days






10. Parturition is controlled by...






11. Way to know everything is alright with the breeding male






12. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






13. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






14. Actual heat cycle (period)






15. 265-285 days






16. Microscopic - make sure not sterile - very few bulls are actually tested






17. Superior genes are _______ to multiply






18. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






19. 45-60 days after breeding; re-breed as required






20. Luteolysis happens because of the ____________ hormone






21. Depository for semen during insemination. where urine leaves the body






22. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






23. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






24. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






25. (FSH) causes egg to mature in females






26. 283 days






27. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






28. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






29. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






30. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






31. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






32. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






33. Allows extension of penis without fibro-elastic penis






34. 19-23 (21) days






35. Microscopic - make sure not sterile - very few bulls are actually tested






36. When are dairy cattle dehorned?






37. 24 hours before end of estrus cycle






38. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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39. 45-60 days after breeding; re-breed as required






40. Days which have increasing daylight hours

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41. Why Dairy calves are fed powdered milk.






42. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






43. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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44. Depository for semen during insemination. where urine leaves the body






45. To remove/separate testicles from animal's body before animal reaches puberty






46. Scar tissue plugs up chambers of udder






47. Can survive ~7 days in cow. vast majority <48 hours






48. 19-23 (21) days






49. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






50. 19-23 (21) days